When the Old Testament speaks about The angel of the Lord, it's referring to Christ. Here he is, just as he is in the New Testament, placed between the people and their enemy. The Egyptians are pursuing the people, and Jesus goes between them, sending light into the Israelites, that they might have hope in the face of their fear.
It may seem to the people as though there wasn't a way out, but with Christ shielding them from their enemies, suddenly a way appears, miraculously. There is hope, and in the place of despair, there is a path through the waters, and the people walk through on dry land.
I don't know what fearful situation you might be facing, but give thanks that our Savior comes to stand between you and that fear. Through his power, there is a way made where there was no way, and there is life beyond despair through the power and love of Christ.